Weighing scales – Self-positioning – Electrical current generating or modifying
Patent
1979-06-25
1985-10-15
Miller, Jr., George H.
Weighing scales
Self-positioning
Electrical current generating or modifying
177DIG9, G01G 314
Patent
active
RE0320030
ABSTRACT:
A weigh scale apparatus in which forces caused by the applied load are transformed into moments of opposite sense and applied to opposite ends of a substantially rigid beam. Deflection of the beam is measured by centrally disposed strain gage resistors to produce an electrical signal quantity proportional to the applied load. The conversion of applied load to moments of opposite sense is accomplished by a pair of spaced parallel pivot members which are suspended by straps between the load receiving pan and the base such that the pivots tend to rotate in opposite directions. The beam is mechanically connected between the pivots such that it is subjected to the bending moment over substantially its entire length. A split scale device is provided by a composite pan, one portion of which is connected to the pivots directly and another portion of which is connected to the pivots through long lever arms to provide moment multiplication. A vibrator device for dithering the pivots is provided.
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Electronic Flexure Base Scale, Electro-Numerics Corporation, 15 Third Street, Santa Rosa, California.
Digiflex Scales, National Controls, Inc., P.O. Box 1501, Santa Rosa, California 95403.
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